<html>
  <head>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
    <script type="text/javascript" src="ffi.js"></script>
  </head>
  <body>
    <center>
        <div id="blackBox" style="background-color: black; width: 200px; height: 200px;"></div>
        <div id="redBox" style="background-color: red; width: 200px; height: 200px;"></div>
        <button id="closeBlack">Close black</button>
        <button id="closeRed">Close red</button>
    </center>
  </body>
</html>
